
/*去除默认样式*/
html, body {
    margin: 0;
    background-color: #fff;
}

/*设置画布样式*/
canvas {
    width: 100%;
    height: 100%;
}

#par {
    position: absolute;
    width: 100%;
    height: calc(100% - 60px);
}

div.butt {
    display: flex;
    position: absolute;
    bottom: 0;
    width: 100%;
    padding-bottom: 20px;
    justify-content: space-around;
    align-items: center;
}


div.butt div{
    width: 20%;
    height: 50px;
    line-height: 50px;
    font-size: 1.2em;
    text-align: center;
    font-weight: 600;
    color: #5a5a5a;
    user-select: none;
    cursor: pointer;
    border:2.5px #5a5a5a solid;
    border-radius: 10px;
    background-color: #fff;
}

div.butt div.b3:hover{
    background-color: rgb(255, 120, 120);
}

div.butt div.b2:hover{
    background-color: rgb(173, 217, 255);
}

div.butt div.b1:hover{
    background-color: rgb(120, 255, 142);
}